ZacharyZhang-NY
8be66c09f2
Palette cycling, sky, sun and moon, clouds, starfield, rain, snow, petals, leaves, fireflies, waterfall, ocean, campfire, lava, aurora, lightning, mountains and a season scene; scanlines, vignette, screen shake, flash, dither fades, iris wipes, dissolves, mosaics, glitches, sparkles, explosions and confetti. Home opens on a live scene in the palette's season and a strip of all eight palettes. pixel adds Canvas.Cycled, Sprite.At, SpriteOf, Kit.Toward and Kit.Shot, which spends a cue under Reduce Motion so it never replays; display exports Reduce. Gallery grids and the sidebar are one Tab stop each.
63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
package fx
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import (
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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type MosaicOptions struct {
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// Cue pixelates the picture and back each time it changes.
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Cue int
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// Slot inks the sprite's # dots.
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Slot pixel.Slot
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Scale int
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Label string
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}
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// blocks are block sides a step each: growing, then back.
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var blocks = [...]int{1, 2, 3, 4, 6, 8, 6, 4, 3, 2, 1}
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// Mosaic pixelates sp in growing blocks, then sharpens it again.
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func Mosaic(c *ui.Context, sp *pixel.Sprite, o MosaicOptions) *ui.Element {
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k := pixel.K(c)
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sc := scale("Mosaic", o.Scale, 1)
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e := box(c, k, o.Label, sp.W*sc, sp.H*sc)
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b := blocks[k.Shot(c, e, o.Cue, 10, len(blocks)-1)]
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return e.Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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if b == 1 {
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g.Sprite(0, 0, sp, 0, o.Slot, sc)
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return
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}
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for y := 0; y < sp.H; y += b {
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for x := 0; x < sp.W; x += b {
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if s, ok := majority(sp, o.Slot, x, y, b); ok {
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g.Rect(x*sc, y*sc, min(b, sp.W-x)*sc, min(b, sp.H-y)*sc, s)
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}
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}
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}
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})
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}
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// majority is a block's commonest slot; clear wins ties.
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func majority(sp *pixel.Sprite, ink pixel.Slot, x0, y0, b int) (pixel.Slot, bool) {
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var n [pixel.Slots + 1]int
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for y := y0; y < min(y0+b, sp.H); y++ {
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for x := x0; x < min(x0+b, sp.W); x++ {
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if s, ok := sp.At(0, x, y, ink); ok {
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n[s]++
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} else {
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n[pixel.Slots]++
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}
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}
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}
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best := pixel.Slots
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for s := range pixel.Slots {
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if n[s] > n[best] {
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best = s
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}
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}
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return pixel.Slot(best), best != pixel.Slots
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}
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